Alan

One further point - probably not applicable in your case.

If you cycle carriers too fast (without wash) they start going into the wave
too hot and will degrade rapidly (as well as burning fingers when they are
loaded).

As a general rule of thumb you can use the table below but there are many
exceptions!

Batch     Product     Product   Carrier
Size      Value       Volume    Type

1-2       Any         very low  Any    (product testing-verification)
5         High        Low       Double Sided
10-15     High        Medium    Double Sided
20-30     High        High      Double Sided
30-50     Medium/Low  High      Open

Hope this helps

Regards

Fin

Finlay Buchan
Technical Director
Datum Dynamics Ltd           Datum Dynamics Inc
Tel +44 (0)1290 426200       +00 401 683 5300
Fax +44 (0)1290 426212       +00 401 683 3995
Email [log in to unmask]
Web Page http://www.datumdynamics.com

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Alan Kreplick
Sent: 15 March 2000 20:15
To: [log in to unmask]
Subject: [TN] Wave Solder Fixture Justification


Hello All:

Anybody out there have a rule-of-thumb or a formula used to determine how
many
wave solder fixtures to purchase?

I'd like to keep the line going by having: 1 fixture being loaded with a
pcb, 2
or 3 fixtures in the machine, 1 fixture being unloaded, and 2 or 3 in the
cleaner (I like to clean - OA flux - after every pass).

Using the above sample, 6 to 8 wave solder fixtures would be required.


Thanks in advance,


Al Kreplick
Sr. Mfg. Eng.
Teradyne, Inc.
978-370-1726

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